Water-cooled hot-gas and hot-blast valve tongue



Aug. 30, 1966 J UERLICHS 3,269,405

WATER-COOLED HOT-GAS AND HOT-BLAST VALVE TONGUE Filed March 16, 1964INVENTOR ATTORNEYS United States Patent M 3,269,405 WATER-COOLED HOT-GASAND HOT-BLAST VALVE TONGUE Johannes Uerlichs, Duren-Birkesdorf, Germany,assignor to Hermann Rappoid & Co. G.m.h.H., Duren-Birlresdorf, GermanyFiled Mar. 16, 1964, Ser. No. 352,116 1 Claim. (Cl. 137340) Thisinvention relates to a water-cooled hot-gas and hot-blast valve tonguewith guiding members provided in the cavity for the conveyance of thecooling medium or cooling water, respectively. The problem essentiallyto be solved by the object of the invention is to materially eliminatethe contamination of the cooling chamber of the valve tongue.

Well knwon in the prior art is the installation of guiding members inthe form of fins or the like in the cavity of the tongue, said cavityforming the cooling chamber. These guiding members determine the path ofthe cooling water. Moreover, cros section contractions have beeninstalled previously in the cooling water path in order to decreasedeposits of impurities in the cooling chamber which impurities have beentaken along by the cooling water and which deposits have been caused bythe increasing speed of the cooling water in the path. These narrowedpassage cross sections have been provided, however, indiscriminately indescending or rising cooling water paths whereby the operatingconditions were in no way fulfilled since the dirt particles werecarried along more readily in the downward path than in the upwardpaths.

This invention, therefore, proposes an arrangement of the guidingmembers in the valve tongue cavity wherein the passage cross sectionsbetween the guiding members for the cooling water are langer in thedownward directed course of the flow than in the upward course of theflow. In this way, the separation of dirt particles is appreciablyeliminated through the entire path of the cooling water since in theupward directed paths, which are mainly jeopardized by sedimentdeposits, the dirt particles are taken along due to the high velocity ofthe flow of the cooling water so that the cooling chamber of the valvetongue is kept considerably free from dirt. The installation of theguiding members is usefully eifected in that the passage cross sectionsformed by the guiding members constantly enlarge or narrow respectivelyin the descending and rising path of the cooling water. Two guidingmembers are advantageously provided at a distance from each otherproceeding away from the cooling water outlet aperture approximately inspiral form towards the tongue center. Between said guiding members thecooling water flows off while its inflow is directed into the areabetween the peripheral wall of the tongue and the outer guiding members.

Another object of the invention is that the guiding members serve at thesame time as spacing and as stifiening means.

With the above and other objects in view which will become apparent fromthe following description a preferred form of the invention is shown inthe drawing which illustrates a valve tongue partly in elevation andpartly in cross section.

In the drawing, the front walls are designated as 1 and 2 and theperipheral wall of a hollow valve tongue Patented August 30, 1966 bodyas 3, said body comprising at its apex on the peripheral wall 3 inletand outlet connections 4 and 5 for the cooling water, said connectionsbeing closely situated each to the other.

In the cavity of the valve tongue are located two baflles 6 and 7 whichextend from the cooling water outlet connection 5 and at a distance fromeach other in a spiral loop to the tongue center, said bafilescompletely filling the width of the tongue cavity so that a coolingmedium channel 8 is created which itself is formed by the peripheralwall 3 and the outer baflie 6 of the spiral loop on the one hand and bythe two bafiles 6 and 7 on the other hand.

This cooling medium channel, which begins at the inlet connection 4 andends at the outlet connection 5 has with equivalent arrangement of theguiding members 6 and 7 a larger passage cross section in its downwarddirected stages than in its upward stages which has the effect that thecooling water in the channel flows faster in the upward direction sothat impurities suspended in the cooling water are taken along andcannot settle. At zones of the cooling water path where the probabilityof steam or air cushion formation exists, openings 9 are provided in thebaflies 6 and 7 through which occasional gases may escape.

It is thought that the invention and its advantages will be understoodfrom the foregoing description and it is apparent that various changesmay be made in the form, construction and arrangement of the partswithout departing from the spirit and scope of the invention orsacrificing its material advantages, the form hereinbefore described andillustrated in the drawings being merely a preferred embodiment thereof.

I claim:

A water-cooled hot-gas or hot-blast valve tongue comprising a casinghaving a cavity with an inlet and outlet for cooling water, an outer andan inner shorter guiding member spaced relative to each other in saidcavity extending away from said cooling water outlet spirally about thecenter of said cavity, the spiral of said outer guiding member from itsstarting point at said outlet to its free end constantly moving closerto the outer peripheral wall of said casing, said free end of saidspiral of said outer guiding member urrounding in an are directeddownwardly in said cavity the free end of said shorter nner guidingmember, said inner guidinlg member from 1ts start ng point at saidoutlet constantly moving away from said outer guiding member, wherebycooling water flows between said guiding members and the supply ofcooling water takes place in the space between the peripheral wall ofsaid casing and said outer guiding member.

References Cited by the Examiner UNITED STATES PATENTS 592,478 10/1897Neeland et a1 137-340 1,918,430 7/1933 Schlotmann 137-340 2,406,5518/1946 Lucke 147 2,470,860 5/ 1949 Parrish 165146 X 2,862,120 11/1958Onsrud 165-146 X M. CARY NELSON, Primary Examiner.

S. SCOTT, Assistant Examiner.

